Home / 20,240.31-27,931.67-11,288.39

Finding the Fourth Proportional to 20,240.31, 27,931.67 and 11,288.39

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Solution

The fourth proportional to 20,240.31, 27,931.67 and 11,288.39 is: 15,578.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.31 : 27,931.67 = 11,288.39 : x
  2. Step 2: Convert to fraction form
    20,240.31/27,931.67 = 11,288.39/x
  3. Step 3: Cross multiply
    20,240.31x = 27,931.67 × 11,288.39
  4. Step 4: Simplify right side
    20,240.31x = 315,303,430.54
  5. Step 5: Solve for x
    x = 315,303,430.54/20,240.31
  6. Step 6: Final answer
    x = 15,578.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.